
#ifdef __cplusplus
	extern "C" {
		#include <cstddef>
	#endif
		#include "private-libwebsockets.h"
		struct libwebsocket *__libwebsocket_client_connect_2(
			struct libwebsocket_context *context,
			struct libwebsocket *wsi
		) {
			struct pollfd pfd;
			struct timeval tv;
			struct hostent *server_hostent;
			struct sockaddr_in server_addr;
			int n;
			int plen = 0;
			char pkt[512];
			int opt = 1;
		#if defined(__APPLE__)
			struct protoent *tcp_proto;
		#endif

			debug("__libwebsocket_client_connect_2\n");

			wsi->candidate_children_list = NULL;

			/*
			 * proxy?
			 */

			if (context->http_proxy_port) {
				plen = sprintf(pkt, "CONNECT %s:%u HTTP/1.0\x0d\x0a"
					"User-agent: libwebsockets\x0d\x0a"
		/*Proxy-authorization: basic aGVsbG86d29ybGQ= */
					"\x0d\x0a", wsi->c_address, wsi->c_port);

				/* OK from now on we talk via the proxy */

				free(wsi->c_address);
				wsi->c_address = strdup(context->http_proxy_address);
				wsi->c_port = context->http_proxy_port;
			}

			/*
			 * prepare the actual connection (to the proxy, if any)
			 */

			debug("__libwebsocket_client_connect_2: address %s", wsi->c_address);

			server_hostent = gethostbyname(wsi->c_address);
			if (server_hostent == NULL) {
				fprintf(stderr, "Unable to get host name from %s\n",
										wsi->c_address);
				goto oom4;
			}

			wsi->sock = socket(AF_INET, SOCK_STREAM, 0);

			if (wsi->sock < 0) {
				fprintf(stderr, "Unable to open socket\n");
				goto oom4;
			}

			server_addr.sin_family = AF_INET;
			server_addr.sin_port = htons(wsi->c_port);
			server_addr.sin_addr = *((struct in_addr *)server_hostent->h_addr);
			bzero(&server_addr.sin_zero, 8);

			/* Disable Nagle */
		#if !defined(__APPLE__)
			setsockopt(wsi->sock, SOL_TCP, TCP_NODELAY,
								  (const void *)&opt, sizeof(opt));
		#else
			tcp_proto = getprotobyname("TCP");
			setsockopt(wsi->sock, tcp_proto->p_proto, TCP_NODELAY,
										&opt, sizeof(opt));
		#endif

			/* Set receiving timeout */
			tv.tv_sec = 0;
			tv.tv_usec = 100 * 1000;
			setsockopt(wsi->sock, SOL_SOCKET, SO_RCVTIMEO, (char *)&tv, sizeof tv);

			if (connect(wsi->sock, (struct sockaddr *)&server_addr,
								 sizeof(struct sockaddr)) == -1)  {
				fprintf(stderr, "Connect failed\n");
		#ifdef WIN32
				closesocket(wsi->sock);
		#else
				close(wsi->sock);
		#endif
				goto oom4;
			}

			debug("connected\n");

			/* into fd -> wsi hashtable */

			insert_wsi(context, wsi);

			/* into internal poll list */

			context->fds[context->fds_count].fd = wsi->sock;
			context->fds[context->fds_count].revents = 0;
			context->fds[context->fds_count++].events = POLLIN;

			/* external POLL support via protocol 0 */
			context->protocols[0].callback(context, wsi,
				LWS_CALLBACK_ADD_POLL_FD,
				(void *)(long)wsi->sock, NULL, POLLIN);

			/* we are connected to server, or proxy */

			if (context->http_proxy_port) {

				n = send(wsi->sock, pkt, plen, 0);
				if (n < 0) {
		#ifdef WIN32
					closesocket(wsi->sock);
		#else
					close(wsi->sock);
		#endif
					fprintf(stderr, "ERROR writing to proxy socket\n");
					goto bail1;
				}

				libwebsocket_set_timeout(wsi,
					PENDING_TIMEOUT_AWAITING_PROXY_RESPONSE, 5);

				wsi->mode = LWS_CONNMODE_WS_CLIENT_WAITING_PROXY_REPLY;

				return wsi;
			}

			/*
			 * provoke service to issue the handshake directly
			 * we need to do it this way because in the proxy case, this is the
			 * next state and executed only if and when we get a good proxy
			 * response inside the state machine
			 */

			wsi->mode = LWS_CONNMODE_WS_CLIENT_ISSUE_HANDSHAKE;
			pfd.fd = wsi->sock;
			pfd.revents = POLLIN;
			if (libwebsocket_service_fd(context, &pfd) < 0)
				goto oom4;

			return wsi;

		oom4:
			if (wsi->c_protocol)
				free(wsi->c_protocol);

			if (wsi->c_origin)
				free(wsi->c_origin);

			free(wsi->c_host);
			free(wsi->c_path);

		bail1:
			free(wsi);

			return NULL;
		}

		/**
		 * libwebsocket_client_connect() - Connect to another websocket server
		 * @context:	Websocket context
		 * @address:	Remote server address, eg, "myserver.com"
		 * @port:	Port to connect to on the remote server, eg, 80
		 * @ssl_connection:	0 = ws://, 1 = wss:// encrypted, 2 = wss:// allow self
		 *			signed certs
		 * @path:	Websocket path on server
		 * @host:	Hostname on server
		 * @origin:	Socket origin name
		 * @protocol:	Comma-separated list of protocols being asked for from
		 *		the server, or just one.  The server will pick the one it
		 *		likes best.
		 * @ietf_version_or_minus_one: -1 to ask to connect using the default, latest
		 *		protocol supported, or the specific protocol ordinal
		 *
		 *	This function creates a connection to a remote server
		 */

		struct libwebsocket *
		libwebsocket_client_connect(struct libwebsocket_context *context,
						  const char *address,
						  int port,
						  int ssl_connection,
						  const char *path,
						  const char *host,
						  const char *origin,
						  const char *protocol,
						  int ietf_version_or_minus_one)
		{
			struct libwebsocket *wsi;
			int n;
			int m;
			struct libwebsocket_extension *ext;
			int handled;
		#ifndef LWS_OPENSSL_SUPPORT
			if (ssl_connection) {
				fprintf(stderr, "libwebsockets not configured for ssl\n");
				return NULL;
			}
		#endif

			wsi = (struct libwebsocket *) malloc(sizeof(struct libwebsocket));
			if (wsi == NULL)
				goto bail1;

			memset(wsi, 0, sizeof *wsi);

			/* -1 means just use latest supported */

			if (ietf_version_or_minus_one == -1)
				ietf_version_or_minus_one = SPEC_LATEST_SUPPORTED;

			wsi->ietf_spec_revision = ietf_version_or_minus_one;
			wsi->name_buffer_pos = 0;
			wsi->user_space = NULL;
			wsi->state = WSI_STATE_CLIENT_UNCONNECTED;
			wsi->pings_vs_pongs = 0;
			wsi->protocol = NULL;
			wsi->pending_timeout = NO_PENDING_TIMEOUT;
			wsi->count_active_extensions = 0;
		#ifdef LWS_OPENSSL_SUPPORT
			wsi->use_ssl = ssl_connection;
		#endif

			wsi->c_port = port;
			wsi->c_address = strdup(address);

			/* copy parameters over so state machine has access */

			wsi->c_path = (char *) malloc(strlen(path) + 1);
			if (wsi->c_path == NULL)
				goto bail1;
			strcpy(wsi->c_path, path);

			wsi->c_host = (char *) malloc(strlen(host) + 1);
			if (wsi->c_host == NULL)
				goto oom1;
			strcpy(wsi->c_host, host);

			if (origin) {
				wsi->c_origin = (char *) malloc(strlen(origin) + 1);
				strcpy(wsi->c_origin, origin);
				if (wsi->c_origin == NULL)
					goto oom2;
			} else
				wsi->c_origin = NULL;

			wsi->c_callback = NULL;
			if (protocol) {
				const char *pc;
				struct libwebsocket_protocols *pp;

				wsi->c_protocol = (char *) malloc(strlen(protocol) + 1);
				if (wsi->c_protocol == NULL)
					goto oom3;

				strcpy(wsi->c_protocol, protocol);

				pc = protocol;
				while (*pc && *pc != ',')
					pc++;
				n = pc - protocol;
				pp = context->protocols;
				while (pp->name && !wsi->c_callback) {
					if (!strncmp(protocol, pp->name, n))
						wsi->c_callback = pp->callback;
					pp++;
				}
			} else
				wsi->c_protocol = NULL;

			if (!wsi->c_callback)
				wsi->c_callback = context->protocols[0].callback;

			/* set up appropriate masking */

			wsi->xor_mask = xor_no_mask;

			switch (wsi->ietf_spec_revision) {
			case 0:
				break;
			case 4:
				wsi->xor_mask = xor_mask_04;
				break;
			case 5:
			case 6:
			case 7:
			case 8:
			case 13:
				wsi->xor_mask = xor_mask_05;
				break;
			default:
				fprintf(stderr,
					"Client ietf version %d not supported\n",
									   wsi->ietf_spec_revision);
				goto oom4;
			}

			/* force no mask if he asks for that though */

			if (context->options & LWS_SERVER_OPTION_DEFEAT_CLIENT_MASK)
				wsi->xor_mask = xor_no_mask;

			for (n = 0; n < WSI_TOKEN_COUNT; n++) {
				wsi->utf8_token[n].token = NULL;
				wsi->utf8_token[n].token_len = 0;
			}

			/*
			 * Check with each extension if it is able to route and proxy this
			 * connection for us.  For example, an extension like x-google-mux
			 * can handle this and then we don't need an actual socket for this
			 * connection.
			 */

			handled = 0;
			ext = context->extensions;
			n = 0;

			while (ext && ext->callback && !handled) {
				m = ext->callback(context, ext, wsi,
					LWS_EXT_CALLBACK_CAN_PROXY_CLIENT_CONNECTION,
						 (void *)(long)n, (void *)address, port);
				if (m)
					handled = 1;

				ext++;
				n++;
			}

			if (handled) {
				debug("libwebsocket_client_connect: ext handling conn\n");

				libwebsocket_set_timeout(wsi,
					PENDING_TIMEOUT_AWAITING_EXTENSION_CONNECT_RESPONSE, 5);

				wsi->mode = LWS_CONNMODE_WS_CLIENT_WAITING_EXTENSION_CONNECT;
				return wsi;
			}

			debug("libwebsocket_client_connect: direct conn\n");

			return __libwebsocket_client_connect_2(context, wsi);


		oom4:
			if (wsi->c_protocol)
				free(wsi->c_protocol);

		oom3:
			if (wsi->c_origin)
				free(wsi->c_origin);

		oom2:
			free(wsi->c_host);

		oom1:
			free(wsi->c_path);

		bail1:
			free(wsi);

			return NULL;
		}


		/**
		 * libwebsocket_client_connect_extended() - Connect to another websocket server
		 * @context:	Websocket context
		 * @address:	Remote server address, eg, "myserver.com"
		 * @port:	Port to connect to on the remote server, eg, 80
		 * @ssl_connection:	0 = ws://, 1 = wss:// encrypted, 2 = wss:// allow self
		 *			signed certs
		 * @path:	Websocket path on server
		 * @host:	Hostname on server
		 * @origin:	Socket origin name
		 * @protocol:	Comma-separated list of protocols being asked for from
		 *		the server, or just one.  The server will pick the one it
		 *		likes best.
		 * @ietf_version_or_minus_one: -1 to ask to connect using the default, latest
		 * 		protocol supported, or the specific protocol ordinal
		 * @userdata: Pre-allocated user data
		 *
		 *	This function creates a connection to a remote server
		 */

		struct libwebsocket *
		libwebsocket_client_connect_extended(struct libwebsocket_context *context,
						  const char *address,
						  int port,
						  int ssl_connection,
						  const char *path,
						  const char *host,
						  const char *origin,
						  const char *protocol,
						  int ietf_version_or_minus_one,
					void *userdata)
		{
			struct libwebsocket *ws =
				libwebsocket_client_connect(context, address, port, ssl_connection, path, host, origin, protocol, ietf_version_or_minus_one) ;

			if (ws && !ws->user_space && userdata)
				ws->user_space = userdata ;

			return ws ;
		  }
#ifdef __cplusplus
	}
#endif
